SE543439C2

SE543439C2 - Arrangement of a drive wheel for an endless track of a tracked vehicle

Info

Publication number: SE543439C2
Application number: SE1950722A
Authority: SE
Inventors: Gustav Söderström
Original assignee: Bae Systems Haegglunds Ab
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2021-02-16
Also published as: WO2020251449A1; SG11202113078UA; EP3983284A4; JP2022536608A; IL288752A; AU2020290333A1; BR112021023941A2; US20220250695A1; EP3983284A1; CA3143243A1; IL288752B1; KR20220024440A; SE1950722A1

Abstract

The present invention relates to an arrangement (A) of a drive wheel (DW) for an endless track (E) of a tracked vehicle (V). The drive wheel (DW) comprises a hub member (H) and a drive sprocket member (S1, S2) attached to the hub member (H). Said drive sprocket member (S1, S2) comprises a ring shaped drive sprocket (10) having a set of teeth (12) arranged around the circumference of said drive sprocket (10). Said drive sprocket (10) is configured to engage with said endless track (E). Said drive sprocket member (S1, S2) further comprises a support member (20) for said drive sprocket (10). Said drive sprocket (10) is divided into at least two arc shaped drive sprocket parts (10A, 10B). Each drive sprocket part (10A, 10B), in a non engaged state of a drive sprocket part with respect to said endless track, is configured to be exchangeable. Said arrangement (A) comprises a guiding configuration (G1, G2) comprising a first guiding member (G1) circumferentially distributed around the support member (20) and a second guiding member (G2) circumferentially distributed around the respective drive sprocket part (10A, 10B) for facilitating reassembling the drive sprocket (10).The present invention also relates to a tracked vehicle.

Description

ARRANGEMENT OF A DRIVE WHEEL FOR AN ENDLESS TRACK OF ATRACKED VEHICLE TECHNICAL FIELD The present invention relates to an arrangement of a drive wheel for anendless track of a tracked vehicle. The present invention also relates to atracked vehicle comprising drive wheels having such an arrangement.

BACKGROUND Tracked vehicles may be equipped with opposite track assemblies. Each trackassembly comprises an endless track arranged to run over a set of wheelscomprising a drive wheel, a tension wheel and a set of road wheels there between.

A drive wheel may be equipped with a hub member and an inner drive sprocketand an outer drive sprocket connected to the respective side of the hub member.

Wear on drive wheels may be relatively large, depending on environment inwhich such tracked vehicles are used. When using endless tracks of rubber,exchange of drive wheels need to be performed in a Workstation, where theeach drive sprocket of the drive wheel needs to be removed. Thus, when thetracked vehicle is not in access of a workstation and there is a need toexchange a drive wheel due to wear on drive sprockets a problematic situation may occur.

There is a need for providing an arrangement of a drive wheel for an endlesstrack which facilitates maintenance of the drive wheel.

OBJECTS OF THE INVENTION An object of the present invention is to provide an arrangement of a drive wheelfor an endless track which facilitates maintenance of the drive wheel.

A further object of the present invention is to provide a vehicle comprising such an arrangement.

SUMMARY OF THE INVENTION These and other objects, apparent from the following description, are achievedby an arrangement and a vehicle, as set out in the appended independentclaims. Preferred embodiments of the arrangement are defined in appendeddependent claims.

According to the invention the objects are achieved by an arrangement of adrive wheel for an endless track of a tracked vehicle. The drive wheelcomprises a hub member and a drive sprocket member attached to the hubmember. Said drive sprocket member comprises a ring shaped drive sprockethaving a set of teeth arranged around the circumference of said drive sprocket.Said drive sprocket is configured to engage with said endless track. Said drivesprocket member further comprises a support member for said drive sprocket.Said drive sprocket is divided into at least two arc shaped drive sprocket parts,each drive sprocket part, in a non engaged state of a drive sprocket part withrespect to said endless track, being configured to be exchangeable. Saidarrangement comprises a guiding configuration comprising a first guidingmember circumferentially distributed around the support member and asecond guiding member circumferentially distributed around the respectivedrive sprocket part for facilitating reassembling the drive sprocket. Ûiia af said and sacanfi auiïišaa members ša a race-ass ana tha atiier ai" aašd first aria* sacoiid auidšiia iiﬁaiiibars Es a piotruaiaiii coiifšatiratí to anaaaa »with :recess Said is a circumferentšailv running aroovfe and said protrusion Es a cšrcumferantiaištf rtsiﬁnšnd rådde.

By thus providing such a guiding configuration, radia| control in connection toassembling/reassembling of the drive sprocket is obtained. By means of sucha first guiding member of the support member and second guiding member ofthe respective drive sprocket part, the drive sprocket and hence each drivesprocket part may be directed to a correct radia| position relative to the supportmember during assembly/reassembly of drive sprocket parts to the supportmember. Thus, hereby maintenance of the drive wheel is facilitated. Further,such a guiding configuration will take up radia| load on the drive wheel whenthe drive wheel is assembled on the tracked vehicle. Such a guidingconfiguration may also facilitate manufacturing of the drive wheels. »ät-ï-:aara-šiﬂtg-g--te-atfi-emšaswdimeifit-e-f--tlae--aififang-eittentﬁts inentšoned. one of said firstand second guiding members is a recess and the other of said first and secondguiding members is a protrusion configured to engage with said recess.Hereby guiding of the sprocket parts when assembling/reassembling thesprocket parts on the support member is facilitated. Hereby correct radia| position of the respective sprocket part relative to the support member is facilitated. n? As rneiwtioiwed said recess is a circumferentially running groove and said protrusion is a circumferentially running ridge. Hereby guiding of the sprocket parts whenassembling/reassembling the sprocket parts on the support member isfacilitated. Hereby correct radia| position of the respective sprocket partrelative to the support member is facilitated. By thus having the protrusion andrecess running circumferentially a sprocket part may be assembled independently of how it is rotated relative to the support member.

According to an embodiment of the arrangement one of said first and secondguiding members is arranged on one side of the support member and the other of said first and second guiding members is opposingly arranged on therespective drive sprocket part. Hereby guiding of the sprocket parts whenassembling/reassembling the sprocket parts on the support member isfacilitated. Hereby correct radia| position of the respective sprocket part relative to the support member is facilitated.

According to an embodiment of the arrangement each arc shaped drivesprocket part, where the drive sprocket is divided, has a first end portion anda second end portion, each end portion of a drive sprocket part beingconfigured to connect with an end portion of another drive sprocket part so asto form said drive sprocket, said arrangement further comprising a connectingconfiguration comprising a first connecting member arranged in connection toan end portion of a drive sprocket part and a second connecting memberarranged in connection to an end portion of another drive sprocket partintended to connect with the first connecting member for facilitatingreassemb|ing the drive sprocket. By thus providing such a connectingconfiguration, radia| and axiai control in connection toassembling/reassembling of the drive sprocket is obtained. By means of sucha first and second connecting members at end portions of drive sprocket partsthe drive sprocket parts may be easily directed to a correct position relative toeach other during assembly/reassembly of drive sprocket parts to the supportmember so that the drive sprocket parts of the drive sprocket are correctlya|igned relative to each other when applied onto the support member of the drive wheel.

According to an embodiment of the arrangement one of said first and secondconnecting members is a recess and the other of said first and secondconnecting members is a protrusion configured to engage with said recess.Hereby guiding of the sprocket parts relative to each other whenassembling/reassembling the sprocket parts on the support member isfacilitated. Hereby correct alignment both radially and axially of the sprocket parts relative to each other is facilitated.

According to an embodiment of the arrangement said drive wheel comprisesan outer drive sprocket member arranged on the outer side of the hub memberand an inner drive sprocket member arranged on the inner side of the hub member.

According to the invention the objects are achieved by a tracked vehicle comprising an arrangement as set out herein.

DESCRIPTION OF THE DRAWINGS For a better understanding of the present invention reference is made to thefollowing detailed description when read in conjunction with the accompanyingdrawings, wherein like reference characters refer to like parts throughout the several views, and in which: Fig. 1 schematically illustrates a side view of a tracked vehicle according to an embodiment of the present disclosure; Fig. 2 schematically illustrates a side view of a track assembly of a trackedvehicle according to an embodiment of the present disclosure; Fig. 3a-b schematically illustrates cross sectional views of the track assemblyin fig. 2 showing a drive wheel for the endless track of the track assemblyaccording to an embodiment of the present disclosure; Fig. 4 schematically illustrates a perspective view of the drive wheel andportion of the track in fig. 3b according to an embodiment of the present disclosure; Fig. 5 schematically illustrates a perspective view of a part of the drive wheelin fig. 4 according to an embodiment of the present disclosure; Fig. 6a schematically illustrates a cross sectional view of a the part of the drive wheel in fig. 5 according to an embodiment of the present disclosure; Fig. 6b schematically illustrates a cross sectional view of a portion of the partof the drive wheel in fig. 6a according to an embodiment of the present disclosure; Fig. 7 schematically illustrates a perspective view of an arc shaped drive sprocket part according to an embodiment of the present disclosure; Fig. 8a schematically illustrates a side view of the arc shaped drive sprocketpart in fig. 7 according to an embodiment of the present disclosure; Fig. 8b schematically illustrates a front view of the arc shaped drive sprocketpart in fig. 7 according to an embodiment of the present disclosure; and Fig. 8c schematically illustrates a rear view of the arc shaped drive sprocketpart in fig. 7 according to an embodiment of the present disclosure.

DETAILED DESCRIPTION Herein the term "rubber" in relation to "rubber track" refers to any e|astic material such as rubber, elastomers or combinations of rubber and elastomers.

According to an aspect of the present disclosure an arrangement of a drivewheel for an end|ess track of a tracked vehicle is provided. The arrangementis an arrangement for facilitating exchange and reassembling of a drivesprocket of a drive wheel of a tracked vehicle. The arrangement is anarrangement for facilitating exchange and reassembling of a respective drivesprocket part of the drive wheel.

Such a tracked vehicle may comprise a right track assembly and a left trackassembly for driving the vehicle. Each track assembly may comprise a drivewheel, a tension wheel, a set of road wheels and an end|ess track arranged torun over said wheels. The end|ess track of the respective track assembly may be arranged to be driven and hence rotated by means of said drive wheel. The tracked vehicle may comprise drive means for driving said drive wheels. Thedrive means may be any suitable drive means such as one or more internal combustion engines and/or one or more electric machines.

The end|ess track of the respective track assembly may have any suitableconfiguration and be of any suitable material. The end|ess track of therespective track assembly may according to an aspect of the presentdisclosure be a rubber track. The end|ess track of the respective trackassembly may according to an aspect of the present disclosure be a steeltrack.

The drive wheel comprises a hub member and a drive sprocket memberattached to the hub member. Said drive sprocket member comprises a ringshaped drive sprocket having a set of teeth arranged around the circumferenceof said drive sprocket.

Said drive sprocket is configured to engage with said end|ess track. Said setof teeth of said drive sprocket are configured to engage with said end|ess track.

Said drive sprocket memberfurther comprises a support memberfor said drivesprocket. Said support member of the drive wheel may be configured to beattached to the hub member. Said support member of the drive wheel may beconfigured to be attached to the hub member by means ofjoint members, e.g. screw joint members.

Said drive sprocket may be configured to be attached to the support member.Said drive sprocket may be configured to be attached to the support member by means ofjoint members, e.g. screwjoint members.

Said drive sprocket is divided into at least two arc shaped drive sprocket parts,each drive sprocket part, in a non engaged state of a drive sprocket part with respect to said end|ess track, being configured to be exchangeable.

When said drive wheel is arranged at the tracked vehicle a portion of the teethof the drive sprocket may be engaged with the end|ess track. When said drive wheel is arranged at the tracked vehicle a portion of the teeth of one drivesprocket part may be engaged with the endless track, and another drivesprocket part may be at a rotated position of the drive wheel so that it is notengaged with the endless track and may thus be removed and exchanged.The drive wheel may then be rotated to another rotated position of the drivewheel so that another drive sprocket part is rotated so that it is not engagedwith the endless track and may thus be removed and exchanged.

Said arrangement comprises a guiding configuration comprising a first guidingmember circumferentia||y distributed around the support member and asecond guiding member circumferentia||y distributed around the respectivedrive sprocket part for faci|itating reassembiing the drive sprocket. Saidarrangement thus comprises a guiding configuration comprising a first guidingmember circumferentia||y distributed around the support member and asecond guiding member circumferentia||y distributed around the respectivedrive sprocket part for faci|itating reassembiing one or more of the drivesprocket parts to the support member. Said arrangement comprises a guidingconfiguration comprising a first guiding member circumferentia||y distributedaround the support member and a second guiding member circumferentia||ydistributed around the respective drive sprocket part for faci|itating assemblingthe drive sprocket and hence one or more of drive sprocket parts of the drivesprocket. A drive sprocket part being assembIe/reassembled may be a newdrive sprocket part replacing a damaged/broken drive sprocket part or thesame drive sprocket part that was removed, which e.g. has been repaired.

Said first guiding member circumferentia||y distributed around the supportmember and second guiding member circumferentia||y distributed around therespective drive sprocket part are configured so that radial control inconnection to assembling/reassembiing of the drive sprocket is obtained. Saidfirst guiding member circumferentia||y distributed around the support memberand second guiding member circumferentia||y distributed around the respective drive sprocket part are configured so that the drive sprocket and hence each drive sprocket part may be directed to a correct radial positionrelative to the support member during assembly/reassembly of drive sprocketparts to the support member.

According to an aspect of the present disclosure one of said first and secondguiding members is a recess and the other of said first and second guidingmembers is a protrusion configured to engage with said recess.

According to an aspect of the present disclosure said recess is acircumferentially running groove and said protrusion is a circumferentiallyrunning ridge. According to an embodiment said circumferentially runninggroove has a certain cross sectional shape, e.g. U-shape, V-shape, arc-shapeor the like, and said circumferentially running ridge has a cross sectionalshape, e.g. rectangular shape, triangu|ar shape, arc shape or the like,configured to at least partly fit in and thus engage with the groove and thus having an essentially corresponding reversed shape.

According to an aspect of the present disclosure one of said first and secondguiding members is arranged on one side of the support member and the otherof said first and second guiding members is opposingly arranged on therespective drive sprocket part. According to an embodiment of thearrangement one of said first and second guiding members is arranged on oneside of the support member and the other of said first and second guidingmembers is arranged on a side of the drive sprocket, i.e. arranged on a side of the respective drive sprocket part.

According to an aspect of the present disclosure one of said first and secondguiding members comprises a set of circumferentially distributedopenings/holes and the other of said first and second guiding memberscomprises a set of circumferentially distributed taps engagable with said openings/holes.

According to an aspect of the present disclosure each arc shaped drivesprocket part, where the drive sprocket is divided, has a first end portion and a second end portion. Each end portion of a drive sprocket part may beconfigured to connect with an end portion of another drive sprocket part so asto form said drive sprocket.

According to an aspect of the present disclosure said arrangement furthercomprises a connecting configuration comprising a first connecting memberarranged in connection to an end portion of a drive sprocket part and a secondconnecting member arranged in connection to an end portion of another drivesprocket part intended to connect with the first connecting member forfacilitating reassemb|ing the drive sprocket. Said arrangement thus comprisesa connecting configuration comprising a first connecting member arranged inconnection to an end portion of a drive sprocket part and a second connectingmember arranged in connection to an end portion of another drive sprocketpart intended to connect with the first connecting member for facilitating reassemb|ing the drive sprocket to the support member.

Said first connecting member arranged in connection to an end portion of adrive sprocket part and a second connecting member arranged in connectionto an end portion of another drive sprocket part are configured such that radia|and axial control in connection to assembling/reassemb|ing of the drive sprocket is obtained.

Said first connecting member arranged in connection to an end portion of adrive sprocket part and a second connecting member arranged in connectionto an end portion of another drive sprocket part are configured such that thedrive sprocket parts may be easily directed to a correct position re|ative to eachother during assembly/reassembly of drive sprocket parts to the supportmember so that the drive sprocket parts of the drive sprocket are correctlya|igned re|ative to each other when applied onto the support member of the drive wheel.

According to an aspect of the present disclosure one of said first and secondconnecting members is a recess and the other of said first and second 11 connecting members is a protrusion configured to engage with said recess.According to an embodiment said recess has certain cross sectional shape,e.g. U-shape, V-shape, arc-shape or the like, and said protrusion has a crosssectional shape, e.g. rectangular shape, triangular shape, arc shape or thelike, configured to at least partly fit in and thus engage with the recess and thushaving an essentially corresponding reversed shape. According to anembodiment said recess is a groove and said protrusion is a ridge, said grooveand ridge respectively having an extension essentially parallel to the axialextension of an imaginary axis of its respective arc shaped drive sprocket part.According to an embodiment said recess is a blind hole and said groove is a tap configured to fit in said hole.

According to an aspect of the present disclosure said drive wheel comprisesan outer drive sprocket member arranged on the outer side of the hub memberand an inner drive sprocket member arranged on the inner side of the hub member.

Fig. 1 schematically illustrates a side view of a tracked vehicle V according to an embodiment of the present disclosure.The vehicle V is according to the disclosure in fig. 1 a military vehicle.

The tracked vehicle V comprises a vehicle body B, which according to anaspect of the present disclosure comprises the chassis of the vehicle V and bodywork.

The tracked vehicle V comprises a right track assembly T1 and a left trackassembly for driving the vehicle V, the right track assembly being shown in fig.1. Each track assembly comprises a drive wheel DW, a tension wheel TW, aset of road wheels RW and an endless track E arranged to run over saidwheels. Here the drive wheel DW is arranged in the front, the tension wheelTW is arranged in the back and the road wheels RW are arranged betweenthe drive wheel DW and the tension wheel TW. The tracked vehicle according to the present disclosure may however have track assemblies with any suitable 12 arrangement of drive wheel, tension wheel and road wheels. According to anaspect of the present disclosure the tension wheel may be arranged in thefront, the drive wheel arranged in the back and the road wheels arranged therebetween.

The endless track E of the respective track assembly is arranged to be drivenand hence rotated by means of said drive wheel DW. The tracked vehicle Vcomprises a drive means, not shown, for driving said drive wheels DW. Thedrive means may be any suitable drive means such as an internal combustion engine and/or an electric machine.

The endless track of the respective track assembly may have any suitableconfiguration and be of any suitable material. The endless track E of therespective track assembly is according to an aspect of the present disclosurea rubber track. The endless track of the respective track assembly may according to an aspect of the present disclosure be a steel track.

Fig. 2 schematically illustrates a side view of a track assembly T1 of a trackedvehicle according to an embodiment of the present disclosure. The trackassembly T1 comprises a drive wheel DW and an endless track E arranged torun over said drive wheel DW. The track assembly T1 may comprise tensionwheel and road wheels, not shown.

Fig. 3a-b schematically illustrates cross sectional views A-A of the trackassembly T1 in fig. 2 showing a drive wheel DW for the endless track E of thetrack assembly T1 according to an embodiment of the present disclosure. Fig.4 schematically illustrates a perspective view of the drive wheel DW andportion of the track E in fig. 3b according to an embodiment of the presentdisclosure. Fig. 5 schematically illustrates a perspective view of a part of the drive wheel in fig. 4 according to an embodiment of the present disclosure.

The drive wheel DW has a centre axis Z, see fig. 3a-b. The drive wheel DWcomprises a hub member H. The hub member H is configured to be operablyengaged with the drive axle of the drive means of the tracked vehicle and 13 configured to be rotated by the drive means. The hub member H is thusarranged to rotate about the centre axis Z, see fig. 3a-b.

The hub member H has according to this embodiment spokes. The hubmember according to the present disclosure may have any suitableconfiguration. The drive means may according to an aspect of the presentdisclosure, not shown, be arranged in connection to the drive wheel such thatthe drive means, e.g. an electric machine, at least partly is accommodatedwithin the periphery of the drive wheel, the drive means axle essentiallycoaxially coinciding with the centre axis Z of the drive wheel.

The hub member H has a front side H1 and an opposite rear side H2, see fig.3a-b. The front side H1 is configured to face out from the vehicle and the rear side H2 is configured to face towards the vehicle.

According to an embodiment of the present disclosure said drive wheel DWcomprises an outer drive sprocket member S1 arranged on the front side H1of the hub member H and an inner drive sprocket member S2 arranged on therear side H2 of the hub member H.

The respective drive sprocket member S1, S2 comprises a ring shaped drivesprocket 10. Each ring shaped drive sprocket 10 has a set of teeth 12 arrangedaround the circumference of the drive sprocket 12. The drive sprocket 10 ofthe respective drive sprocket member S1, S2 is configured to engage with saidendless track E. Said teeth 12 of said drive sprocket 10 of the respective drive sprocket member S1, S2 is configured to engage with said endless track E.

Said teeth are 12 configured to engage with an endless track of the tracked vehicle.

The respective drive sprocket member S1, S2 comprises a support member20 for the respective drive sprocket 10. According to this embodiment, theouter drive sprocket member S1 comprises a support member 20 for the drivesprocket 10 of said outer drive sprocket member S1. According to this 14 embodiment, the inner drive sprocket member S2 comprises a supportmember for the drive sprocket 10 of said inner drive sprocket member S2.

The support member 20 of the respective drive sprocket member S1, S2 has,according to the embodiment in fig. 2 and 3, a ring shaped configuration. Thesupport member 20 of the respective drive sprocket member S1, S2 has anouter side 20a and an opposite inner side 20b.

The support member 20 of the respective drive sprocket member S1, S2 hasa front side 20c and an opposite rear side 20d.

The front side 20c of the support member 20 of the outer drive sprocket S1 isconfigured to face away from the front side H1 of the hub member H whenattached to the hub member H. The front side 20c of the support member 20of the inner drive sprocket S2 is configured to face away from the rear side H2of the hub member H when attached to the hub member H.

The rear side 20d of the support member 20 of the outer drive sprocket S1 isconfigured to face towards the front side H1 of the hub member H whenattached to the hub member H. The rear side 20d of the support member 20of the inner drive sprocket S2 is configured to face towards the rear side H2 of the hub member H when attached to the hub member H.

The drive sprocket 10 of the respective drive sprocket member S1, S2 has anouter side 10a and an opposite inner side 10b.

The drive sprocket 10 of the respective drive sprocket member S1, S2 has a front side 10c and an opposite rear side 10d.

The front side 10c of the drive sprocket 10 of the outer drive sprocket memberS1 is configured to face away from the front side 20c of the support member20 of the outer drive sprocket member S1 when attached to the supportmember 20. The front side 10c of the drive sprocket 10 of the inner drivesprocket member S2 is configured to face away from the front side 20c of thesupport member 20 of the inner drive sprocket member S2 when attached to the support member 20 of the inner drive sprocket member S2. The teeth 12of the drive sprocket 10 are configured to protrude from the front side 10c.

The rear side 10d of the drive sprocket 10 of the outer drive sprocket memberS1 is configured to face towards the front side 20c of the support member 20of the outer drive sprocket member S1 when attached to the support member20. The rear side 10d of the drive sprocket 10 of the inner drive sprocketmember S2 is configured to face towards the front side 20c of the supportmember 20 of the inner drive sprocket member S2 when attached to thesupport member 20.

The drive sprocket 10 of the respective drive sprocket member S1, S2 of thedrive wheel DW comprises a base portion 14. The base portion 14 has an arcshape. The base portion 14 comprises said outer side 10a, opposite inner side10b, said front side 10c and said rear side 10d. The teeth 12 are configured toproject from said base portion 14 on the outer side 10a and from the front side10c.

The drive sprocket 10 of the respective drive sprocket member S1, S2 of thedrive wheel DW comprises a base portion 14.

According to this embodiment the drive sprocket 10 of the respective drivesprocket member S1, S2 comprises a set of fastening members 16 arrangedaround the inner side 10b of the respective ring shaped drive sprocket 10, seefig. 5 showing the set of fastening members 16 for the outer drive sprocketmember S1 _ The respective fastening member 16 comprises or is arranged toreceive a bolt joint J for attaching the drive sprocket 10 to the support member20 of the respective drive sprocket member S1, S2 of the drive wheel DW. Thenumber of bolt joints for attaching the drive sprocket to the support member ofthe respective drive sprocket member may be any suitable number and mayvary depending on e.g. configuration of the tracked vehicle.

According to this embodiment the fastening members 16 are attached to corresponding fastening members 26 of the support member 20 by means of 16 said boltjoints J. Thus, the support member 20 of the respective drive sprocketmember S1, S2 comprises a set of fastening members 26 arranged aroundthe inner side 20b of the respective ring shaped support member 20.

The drive sprocket 10 of the respective drive sprocket member S1, S2 of thedrive wheel DW is according to this embodiment divided into two arc shapeddrive sprocket parts 10A, 10B, a first arc shaped drive sprocket part 10A anda second arc shaped drive sprocket part 10B, see fig. 5. Depending on e.g.number of teeth the respective arc shaped drive sprocket part may be thesame article or different articles. ln fig. 3a-b and fig. 4 the first drive sprocketpart 10A is visible. The first arc shaped drive sprocket part 10A and the secondarc shaped drive sprocket part 10B are configured to be connected to eachother at its respective end portions. When the arc shaped drive sprocket parts10A, 10B are connected, said drive sprocket 10 is formed. When the arcshaped drive sprocket parts 10A, 10B are connected a first border B1 is formedwhere the first end portion of the respective drive sprocket parts 10A, 10B areconnected and a second border B2 formed where the second end portion ofthe respective drive sprocket parts 10A, 10B are connected, see fig. 5.

Each drive sprocket part 10A, 10B, in a non engaged state of a drive sprocketpart with respect to said endless track E, is configured to be exchangeable.Thus, the drive sprocket with the respective drive sprocket part 10A, 10B isconfigured such that, in a certain rotational position of the drive wheel DW, oneof the drive sprocket parts will not be engaged with the endless track E, whichfacilitates removing that drive sprocket part. By then rotating the endless trackE so that the drive wheel DW is rotated to a certain new rotational position, theother drive sprocket part will not be engaged with the endless track and my thus also be removed. ln fig. 3a the first drive sprocket part 10A of the drive sprocket 10 of the outerdrive sprocket member S1 is being removed from the support member 20. lnfig. 3b the first drive sprocket part 10A of the drive sprocket 10 of the inner drive sprocket member S2 is being removed from the support member 20. 17 Fig. 6a schematically illustrates a cross sectional view of a the part of the drivewheel DW in fig. 5 according to an embodiment of the present disclosure; andfig. 6b schematically illustrates a cross sectional view of a portion of the partof the drive wheel DW in fig. 6a according to an embodiment of the present disclosure.

The drive axle A of the drive wheel DW is illustrated in fig. 6a. The drive shaftA is configured to rotate the drive wheel DW about the axis Z by means of the drive arrangement of the vehicle.

Fig. 7 schematically illustrates a perspective view of an arc shaped drivesprocket part according to an embodiment of the present disclosure; fig. 8aschematically illustrates a side view of the arc shaped drive sprocket part infig. 7 according to an embodiment of the present disclosure; fig. 8bschematically illustrates a front view of the arc shaped drive sprocket part infig. 7 according to an embodiment of the present disclosure; and fig. 8cschematically illustrates a rear view of the arc shaped drive sprocket part infig. 7 according to an embodiment of the present disclosure.

Each arc shaped drive sprocket part 10A, 10B has, as mentioned above a firstend portion 10e and a second end portion 10f configured to provide saidborders B1, B2 when the drive sprocket parts forming the drive sprocket 10are attached on the support member 20 of the drive wheel DW. The first endportion 10e and the second end portion 10f of the arc shaped drive sprocket10A is illustrated in fig. 7 and fig. 8b-c.

When the arc shaped drive sprocket parts 10A, 10B are connected a firstborder B1 is formed where the first end portion of the respective drive sprocketparts 10A, 10B are connected and a second border B2 formed where thesecond end portion of the respective drive sprocket parts 10A, 10B areconnected, see fig. 5.

The present disclosure comprises an arrangement of a drive wheel. The arrangement is an arrangement for facilitating exchange and reassembling of 18 the drive sprocket 10 of the drive wheel DW. The arrangement is anarrangement for facilitating exchange and reassembling of the respective drivesprocket part 10A, 10B of the drive wheel DW.

Said arrangement comprises a guiding configuration G1, G2 for facilitatingexchange and reassembling of the drive sprocket 10 and hence the respectivedrive sprocket part 10A, 10B of the drive wheel DW.

Said guiding configuration G1, G2 comprises a first guiding member G1circumferentially distributed around the support member 20.

Said guiding configuration G1, G2 comprises a second guiding member G2circumferentially distributed around the respective drive sprocket part andhence the drive sprocket 10 for facilitating reassembling the drive sprocket 10.

According to an embodiment of the arrangement one of said first and secondguiding members G1, G2 is a recess and the other of said first and secondguiding members G1, G2 is a protrusion configured to engage with said recess.According to the embodiment disc|osed with reference to e.g. fig. 6a-b the firstguiding member G1 arranged on the respective support member 20 is aprotrusion G1. According to the embodiment disc|osed with reference to e.g.fig. 6a-b the second guiding member G2 arranged on the respective drivesprocket 10 is a recess G2.

According to this embodiment of the arrangement said protrusion G1 is acircumferentially running ridge G1 running around the front side 20c of the support member 20.

Thus, according to this embodiment of the arrangement said protrusion G1 isconfigured to run in an arc shaped track, i.e. an arc shaped ridge G1 on thefront side 20c of the support member 20, following the ring shaped extensionof the support. According to this embodiment of the arrangement saidprotrusion G1 is configured to run in a circie, i.e. an circu|ar ridge G1 on the 19 front side 20c of the support member 20, following the ring shape of the supportmember 20.

According to this embodiment of the arrangement said recess G2 is acircumferentially running groove G2 running around the rear side 10d of thedrive sprocket 10, i.e. the rear side 10d of the respective drive sprocket part10A, 10B, see also fig. 8a and fig. 8c. Thus, according to this embodiment ofthe arrangement said recess G2 is configured to run in an arc shaped track,i.e. an arc shaped groove G2 on the rear side 10d of the respective drivesprocket part 10A, 10B, following the arc shaped extension of the respectivedrive sprocket part 10A, 10B. The groove G2 of the respective drive sprocketpart 10A, 10B is configured to run in an arc shaped track such that, when thesprocket parts 10A, 10B are connected so that the ring shaped drive sprocket10 with the first and second borders B1, B2 is formed, the grooves G2 areconfigured to coincide so that a circular groove G2 is formed on the rear sideof the drive sprocket 10.

The recess G2, e.g. groove G2, may have any suitable cross sectionconfigured to receive said protrusion G2 of the support member 20. The recessG2 may have any suitable polygonal cross section. The recess G2 mayaccording to an embodiment have an arc shaped cross section. The recessG2 may according to an embodiment have a U-shaped cross section. Therecess G2 may according to an embodiment have a V-shaped cross section.The recess G2 may according to an embodiment have a rectangular-shaped, e.g. square-shaped, cross section.

The protrusion G1, e.g. ridge G1, may have any suitable cross sectionconfigured to receive the recess G2 of the respective sprocket part 10A, 10Bof the sprocket 10 having a corresponding cross section. The ridge G2 mayhave any suitable polygonal cross section. The ridge G1 may according to anembodiment have an arc shaped cross section configured to at least partly fitinto a recess G2 of the respective sprocket part 10A, 10B having a corresponding arc-shaped cross section. The ridge G1 may according to an embodiment have a rectangular cross section configured to at least partly fitinto a recess G2 of the respective sprocket part 10A, 10B having acorresponding U-shaped cross section. The ridge G1 may according to anembodiment have a triangular cross section configured to at least partly fit intoa recess G2 of the respective sprocket part 10A, 10B having a corresponding V-shaped cross section.

According to an embodiment of the arrangement, not shown, one of said firstand second guiding members comprises a set of circumferentially distributedopenings/holes and the other of said first and second guiding memberscomprises a set of circumferentially distributed taps engagab|e with saidopenings/holes.

As mentioned above the first end portion 10e and a second end portion 10f ofthe respective arc shaped drive sprocket part 10A, 10B, see fig. 7 and fig. 8b-c, is configured to provide said borders B1, B2, see fig. 5, when the drivesprocket parts forming the drive sprocket 10 are attached on the supportmember 20 of the drive wheel DW.

The first end portion 10e and a second end portion 10f of the respective arcshaped drive sprocket part 10A, 10B thus provides the borders where the drive sprocket 10 is divided.

The arrangement for faci|itating exchange and reassemb|ing of the respectivedrive sprocket part 10A, 10B of the drive wheel DW may according to an aspectof the present disc|osure further comprise a connecting configuration C1, C2comprising a first connecting member C1 arranged in connection to an endportion of a drive sprocket part and a second connecting member C2 arrangedin connection to an end portion of another drive sprocket part intended toconnect with the first connecting member C1 for faci|itating reassemb|ing the drive sprocket.

According to an embodiment of the arrangement one of said first and second connecting members C1, C2 is a recess and the other of said first and second 21 connecting members G1, G2 is a protrusion configured to engage with saidrecess. According to an embodiment said recess has certain cross sectionalshape, e.g. U-shape, V-shape, arc-shape or the like, and said protrusion hasa cross sectional shape, e.g. rectangular shape, triangular shape, arc shapeor the like, configured to at least partly fit in and thus engage with the recessand thus having an essentially corresponding reversed shape. According to anembodiment said recess is a groove and said protrusion is a ridge, said grooveand ridge respectively having an extension essentially parallel to the axialextension of an imaginary axis of its respective arc shaped drive sprocket part.According to an embodiment said recess is a blind hole and said groove is atap configured to fit in said hole.

Fig. 8b schematically illustrates an exemplary embodiment of the presentdisclosure in which the first arc shaped drive sprocket part 10A has a firstconnecting member G1 arranged in connection to the first end portion 10e anda second connecting member G2 arranged in connection to the second endportion 10f. The first connecting member G1 is according to this example arecess G1 and the second connecting member G2 is according to this examplea protrusion G2.

With the first arc shaped drive sprocket part 10A having a connectingconfiguration G1, G2 according to fig. 8b, the second arc shaped sprocket part10B would then be arranged with a connecting configuration G1, G2 with a firstconnecting member G1 arranged in connection to the first end portion 10e inthe shape of a recess G1 and a second connecting member G2 in the shapeof a protrusion G2. Hereby the recess G1 at the first end portion 10e of the firstdrive sprocket part 10A would engage with the protrusion G2 at the secondend portion 10f of the second drive sprocket part 10B and the protrusion G2 atthe second end portion 10f of the first drive sprocket part 10A would engagewith the recess G1 at the first end portion 10e of the second drive sprocket part10B, thus forming the drive sprocket 10 when assembled. 22 Alternatively, not shown, the first arc shaped drive sprocket part 10A couldhave a first connecting member C1, e.g. a recess, in connection to both thefirst end portion 10e and the second end portion 10f, wherein the second arcshaped drive sprocket part 10B would have a second connecting member C2,e.g. a protrusion, in connection to both the first end portion 10e and the secondend portion 10f for engagement with the first connecting members C1.

Fig. 6a schematically i||ustrates a cross sectiona| view of a the part of the drivewheel DW in fig. 5, showing the hub member H, a support member 20 and adrive sprocket 10 according to an embodiment of the present disclosure.According to this embodiment the support member 20 has a base part 22 anda periphera| part 24. The base part 22 comprises according to this embodimentthe second guiding member G2 in the shape of said circumferentia| runningridge G2 running on the front side 20c of the support member 20. Theperiphera| part 24 is according to this embodiment configured to surround andrun around the base part 22. The periphera| part 24 comprises according tothis embodiment the outer side 20a of the support member 20. By thus dividingthe support member 20 into a base part 22 and a periphera| part 24 said parts22, 24 may be made ofdifferent materials.

According to an embodiment the base part 22 is made of steel and theperiphera| part 24 is made of a plastic material. Hereby the weight of the drivewheel DW may be reduced. Further, improved durability may be obtained incertain environmental conditions. This may also lead to less packaging of snow and ice in winter conditions.

The foregoing description of the preferred embodiments of the presentinvention has been provided for the purposes of illustration and description. ltis not intended to be exhaustive or to limit the invention to the precise formsdisclosed. Obviously, many modifications and variations will be apparent topractitioners skilled in the art. The embodiments were chosen and describedin order to best explain the principles of the invention and its practical applications, thereby enabling others skilled in the art to understand the 23 invention for various embodiments and with the various modifications suited to the particular use contemplated.

Below some general aspects of the arrangement and the tracked vehicleaccording to the present disclosure are listed.

Aspect 1:a tracked vehicle V, the drive wheel DW comprising a hub member H and a An arrangement A of a drive wheel DW for an endless track E of drive sprocket member S1, S2 attached to the hub member H, said drivesprocket member S1, S2 comprising a ring shaped drive sprocket 10 having aset of teeth 12 arranged around the circumference of said drive sprocket 10,said drive sprocket 10 being configured to engage with said endless track E,said drive sprocket member S1, S2 further comprising a support member 20for said drive sprocket 10, said drive sprocket 10 being divided into at least twoarc shaped drive sprocket parts 10A, 10B, each drive sprocket part 10A, 10B,in a non engaged state of a drive sprocket part with respect to said endlesstrack E, being configured to be exchangeable, wherein each arc shaped drivesprocket part 10A, 10B, where the drive sprocket 10 is divided, has a first endportion 10e and a second end portion 10f, each end portion of a drive sprocketpart being configured to connect with an end portion of another drive sprocketpart so as to form said drive sprocket 10, said arrangement A furthercomprising a connecting configuration C1, C2 comprising a first connectingmember C1 arranged in connection to an end portion of a drive sprocket partand a second connecting member C2 arranged in connection to an end portionof another drive sprocket part intended to connect with the first connectingmember C1 for facilitating reassembling the drive sprocket 10.

Aspect 2: and second connecting members C1, C2 is a recess C1 and the other of said An arrangement according to aspect 1, wherein one of said first first and second connecting members C2 is a protrusion C2 configured toengage with said recess C1. 24 Aspect 3:arrangement A comprising a guiding configuration G1, G2 comprising a first An arrangement according to aspect 1 or 2, wherein said guiding member G1 circumferentially distributed around the support member20 and a second guiding member G2 circumferentially distributed around therespective drive sprocket part 10A, 10B for facilitating reassembiing the drivesprocket 10.

Aspect 4: said first and second guiding members G1, G2 is a recess G2 and the other of An arrangement according to any of aspects 1-3, wherein one of said first and second guiding members G1, G2 is a protrusion G1 configured to engage with said recess G2.

Aspect 5: a circumferentially running groove and said protrusion G1 is a circumferentially An arrangement according to aspect 4, wherein said recess G2 is running ridge.

Aspect 6:said first and second guiding members G1, G2 is arranged on one side 10c of An arrangement according to any of aspects 3-5, wherein one of the support member (20) and the other of said first and second guidingmembers G1, G2 is opposingly arranged on the respective drive sprocket part10A, 10B.

Aspect 7: DW comprising an outer drive sprocket member S1 arranged on the outer side An arrangement according to any of aspects 1-6, said drive wheel of the hub member H and an inner drive sprocket member S2 arranged on the inner side of the hub member H.

Aspect 8:aspects 1-7.

A vehicle V comprising an arrangement according to any of

Claims

1. 1. Ett arrangemang (A) hos ett drivhjul (DW) för ett ändlöst band (E) hos ettbandfordon (V), där drivhjulet (DW) innefattar ett navorgan (H) och ettdrivkuggkransorgan (S1, S2) anslutet till navorganet (H), där nämndadrivkuggkransorgan (S1, S2) innefattar en ringformad drivkuggkrans (10) meden uppsättning tänder (12) anordnade kring omkretsen hos nämndadrivkuggkrans (10), där nämnda drivkuggkrans (10) är konfigurerad att bringasi ingrepp med nämnda ändlösa band (E), där nämnda drivkuggkransorgan (S1,S2) vidare innefattar ett stödorgan (20) för nämnda drivkuggkrans (10),kännetecknat av att nämnda drivkuggkrans (10) är uppdelad i åtminstone tväbägformade drivkuggkransdelar (10A, 10B), där vardera drivkuggkransdel(10A, 10B), i ett icke-ingreppstillständ hos en drivkuggkransdel med avseendepä nämnda ändlösa band (E), är konfigurerad att vara utbytbar, där nämndaarrangemang (A) innefattar en guidekonfiguration (G1, G2) innefattande ettförsta guideorgan (G1) fördelat i omkretsled kring stödorganet (20) och ettandra guideorgan (G2) fördelat i omkretsled kring respektive drivkuggkransdel(10A, 10B) för att underlätta ätermontering av drivkuggkransen (10), varvid ettav nämnda första och andra guideorgan (G1, G2) är en urtagning (G2) och detandra av nämnda första och andra guideorgan (G1, G2) är ett utspräng (G1)konfigurerat att bringas i ingrepp med nämnda urtagning (G2), varvid nämndaurtagning (G2) är ett i omkretsled löpande spär och nämnda utspräng (G1) är en i omkretsled löpande nock.

2. Arrangemang enligt krav 1, varvid ett av nämnda första och andraguideorgan (G1, G2) är anordnade pä en sida (10c) hos stödorganet (20) ochdet andra av nämnda första och andra guideorgan (G1, G2) är motstäende anordnat på respektive drivkuggkrans (10A, 10B).

3. Arrangemang enligt krav 1 eller 2,drivkuggkransdel (10A, 10B), där drivkuggkransen (10) är delad, har ett första ändparti (10e) och ett andra ändparti (10f), där vardera ändparti hos en varvid vardera bägformad drivkuggkransdel är konfigurerad att förbindas med ett ändparti hos en annan 26 drivkuggkransdel för att bilda nämnda drivkuggkrans (10), där nämndaarrangemang (A) vidare innefattar en förbindeisekonfiguration (G1, G2)innefattande ett första förbindelseorgan (G1) anordnat i anslutning till ettändparti hos en drivkuggkransdel och ett andra förbindelseorgan (G2)anordnat i anslutning till ett ändparti hos en annan drivkuggkransdel avseddatt förbindas med det första förbindelseorganet (G1) för att underlättaätermontering av drivkuggkransen (10).

4. Arrangemang enligt krav 3, varvid ett av nämnda första och andraförbindelseorgan (G1, G2) är en urtagning och det andra av nämnda första ochandra förbindelseorgan (G2) är ett utspräng (G2) konfigurerat att bringas iingrepp med nämnda urtagning.

5. Arrangemang enligt något av kraven 1-4, för ett bandfordon (V) med etthöger bandställ och ett vänster bandställ, där vardera bandställ innefattar ettändlöst band och ett drivhjul (W) för det ändlösa bandet, där nämnda drivhjul(DW) innefattar ett yttre drivkuggkransorgan (S1) anordnat på yttersidan hosnavorganet (H) och ett inre drivkuggkransorgan (S2) anordnat pä innersidanhos navorganet (H).

6. Ett bandfordon (V) innefattande ett arrangemang enligt något av kraven 1-